feat(spanish model): add the spanish noun chunker

spacy/syntax/iterators.pyx

@@ -1,7 +1,7 @@
 # coding: utf-8
 from __future__ import unicode_literals
 
-from ..parts_of_speech cimport NOUN, PROPN, PRON
+from ..parts_of_speech cimport NOUN, PROPN, PRON, VERB, AUX
 
 
 def english_noun_chunks(obj):
@@ -66,4 +66,55 @@ def german_noun_chunks(obj):
             yield word.left_edge.i, rbracket, np_label
 
 
-CHUNKERS = {'en': english_noun_chunks, 'de': german_noun_chunks}
+def es_noun_chunks(obj):
+
+    doc = obj.doc
+    np_label = doc.vocab.strings['NP']
+
+    left_labels = ['det', 'fixed', 'neg'] #['nunmod', 'det', 'appos', 'fixed']
+    right_labels = ['flat', 'fixed', 'compound', 'neg']
+    stop_labels = ['punct']
+
+    np_left_deps = [doc.vocab.strings[label] for label in left_labels]
+    np_right_deps = [doc.vocab.strings[label] for label in right_labels]
+    stop_deps = [doc.vocab.strings[label] for label in stop_labels]
+
+    def next_token(token):
+        try:
+            return token.nbor()
+        except:
+            return None
+
+    def noun_bounds(root):
+
+        def is_verb_token(token):
+            return token.pos in [VERB, AUX]
+
+        left_bound = root
+        for token in reversed(list(root.lefts)):
+            if token.dep in np_left_deps:
+                left_bound = token
+
+        right_bound = root
+        for token in root.rights:
+            if (token.dep in np_right_deps):
+                left, right = noun_bounds(token)
+
+                if list(filter(lambda t: is_verb_token(t) or t.dep in stop_deps, doc[left_bound.i: right.i])):
+                    break
+                else:
+                    right_bound = right
+
+        return left_bound, right_bound
+
+
+    token = doc[0]
+    while token and token.i < len(doc):
+        if token.pos in [PROPN, NOUN, PRON]:
+            left, right = noun_bounds(token)
+            yield left.i, right.i+1, np_label
+            token = right
+        token = next_token(token)
+
+
+CHUNKERS = {'en': english_noun_chunks, 'de': german_noun_chunks, 'es': es_noun_chunks}